Davide Pesavento
acd00876f9
Using std::function is overkill Change-Id: I0e60592aea1b2fb82c3ea780701dae5e129a9810
100 lines
2.5 KiB
C++
100 lines
2.5 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2014-2018, Regents of the University of California,
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* Arizona Board of Regents,
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* Colorado State University,
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* University Pierre & Marie Curie, Sorbonne University,
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* Washington University in St. Louis,
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* Beijing Institute of Technology,
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* The University of Memphis.
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*
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* This file is part of NFD (Named Data Networking Forwarding Daemon).
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* See AUTHORS.md for complete list of NFD authors and contributors.
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*
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* NFD is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Foundation,
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* either version 3 of the License, or (at your option) any later version.
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*
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* NFD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* NFD, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef NFD_CORE_PRIVILEGE_HELPER_HPP
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#define NFD_CORE_PRIVILEGE_HELPER_HPP
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#include "common.hpp"
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#include <unistd.h>
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namespace nfd {
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class PrivilegeHelper
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{
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public:
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/** \brief represents a serious seteuid/gid failure
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*
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* This should only be caught by main as part of a graceful program termination.
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* \note This is not an std::exception and BOOST_THROW_EXCEPTION should not be used.
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*/
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class Error
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{
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public:
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explicit
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Error(const std::string& what)
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: m_whatMessage(what)
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{
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}
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const char*
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what() const
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{
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return m_whatMessage.data();
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}
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private:
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const std::string m_whatMessage;
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};
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static void
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initialize(const std::string& userName, const std::string& groupName);
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static void
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drop();
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template<class F>
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static void
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runElevated(F&& f)
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{
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raise();
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try {
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f();
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}
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catch (...) {
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drop();
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throw;
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}
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drop();
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}
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PUBLIC_WITH_TESTS_ELSE_PRIVATE:
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static void
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raise();
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PUBLIC_WITH_TESTS_ELSE_PRIVATE:
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#ifdef HAVE_PRIVILEGE_DROP_AND_ELEVATE
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static uid_t s_normalUid;
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static gid_t s_normalGid;
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static uid_t s_privilegedUid;
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static gid_t s_privilegedGid;
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#endif // HAVE_PRIVILEGE_DROP_AND_ELEVATE
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};
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} // namespace nfd
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#endif // NFD_CORE_PRIVILEGE_HELPER_HPP
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